The DPD API allows you to easily integrate your website with DPD.
The DPD cart API currently lets you list your storefronts (websites) and products.
PHP 4.3 or better; 5.2 or better recommended. The Moxiecode_JSON class is required if using PHP 4.3. The cURL PHP extension is required for all versions of PHP.
<?php
require_once "DPDCartApi.class.php";
$dpd = new DPDCartApi("your username", "your key");
$websites = $dpd->getStorefronts();
$products = $dpd->getProducts($websites[0]["id"]);
var_export($products);
?>